Cultivator



(No Modem f i E. E. BOSTWICK.'

- GULTIVATOR. ,i No. 256,542. Patented Apr. 148, 1882.

N, PETERS. Pnomumognprm. wminm., n. c.

UNITED. STATES PATENT OEEIcE.

EDWARD BOSTWICK, OF UNION CITY, MICHIGAN.

. CULTIVATOR.

SPECIFICATION forming part of Letters Patent No.256,542,*dated -April18, 1882 Application filed October 26, 1881. (No model.)

To all whom it may concern:

Be it known'that LEDWARD E. BosrwIcK, of Union City, in the county ot'Branch and State of Michigan, have invented an Improvement inCultivators, of which the following is a specification.

The nature of this invention relates to certain new and usefulimprovements in rotary cultivators; and the invention consists in thepeculiar construction and combination of parts, as morefull yhereinafter described and claimed.

Figure l is a plan. Fig. 2 is a longitudinal vertical section on theline w ac in Fig. 1; and Fig. 3 is an enlarged perspective of thetoot-hcarrying arms. t

In the accompanying drawings, which form a part of this specication, Arepresents a frame, the inn'er end ot' which isjournaled upon the axleB, which also carries the tractionwheels C.

D is a tongue.

E is another frame, also journaled to the axle B by means of suitableboxes above thc frame A. In this frame E there arejournaled vshafts FandG. Upon the axle B there is secured a spur-wheel, H, which engages witha pinion, I, upon the shaft F, by means ot' which motion is communicatedto said shaft. This shaft F has secured tol it, also, another spurwheel,J, which engages with a pinion, K, secured upon the shaft G, and bythese means the slow rotation of the axle B or ofthe traction-wheels Cis rapidly multiplied and communicated to the shaft G. Upon this shaft Gare spirally arranged a series of arms, L, which are secured in positionon the shaft and with relation to each other by means of intermediatec1utches,'M, interposed between each pair of arms and engaging with theclutchhubsNthereof. These arms I prefer to make in reverse curves, asshown in Fig. 3, and each end of the arms is provided with a slot, O, to

receive the shanks P, to the outer ends of which pole or tongue, withits shorter end attached to the front end of the frame E by means of alink, T. By means of this lever and its connections and theratchet-segment U the relative position of the rear end of the frame Eto the ground is regula-ted.

W are gage-wheels secured pivotally to the lower ends of the standardsV, which in turn are secured by any of the known devices to the frame Eat or near its rear end, and adapted to be susceptible ot' a verticalmotion as the pitch of said frame may require as the same is changedfrom time to time.

The shanks P are secured in the slots O byl means of bolts a and woodenpins b, so that if theteeth strike stones orother impediments the pins bwill break and prevent other derangement of the machine.

What I claim as my invention is In a rotarycultivator, the combination,with the transverse shaft and means, substantially as described, foroperating said shaft., of the duplex arms L, having clutch-hubs N andslots O, and the Shanks P, secured within said slots by bolts a andbreak-pins b, all constructed and adapted to operate as specified.

EDWARD E. lBOSTWICKl l'Witnessesz H. S. SPRAGUE, E. SOULLY.

